|Publication number||US4975771 A|
|Application number||US 07/457,403|
|Publication date||4 Dec 1990|
|Filing date||18 Dec 1989|
|Priority date||10 Feb 1989|
|Also published as||CA2007964A1, CA2007964C, WO1990012472A1|
|Publication number||07457403, 457403, US 4975771 A, US 4975771A, US-A-4975771, US4975771 A, US4975771A|
|Inventors||Salim A. Kassatly|
|Original Assignee||Kassatly Salim A|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (11), Non-Patent Citations (4), Referenced by (185), Classifications (33), Legal Events (6)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This is a continuation in part of application Ser. No. 308,826, filed Feb. 2, 1989, U.S. Pat. No. 4,903,126.
1. Technical Field
The present invention relates in general to telecommunications systems such as television and TV cable broadcasting. It more particularly relates to a method and apparatus for an efficient video broadcasting.
2. Background Information.
Conventional Television and TV cable broadcasting is generally carried out on a real-time basis. For instance, it takes the same length of time to broadcast or transmit a TV program than it does to receive and display the program. Such broadcasting method has proven to be less than completely desirable due to limited TV bandwidth and channels allocation therein.
Channel availability has been a crucial limitation in the broadcasting industry. Channel allocation has been very valuable and expensive. It has precluded several interested persons, small businesses, consumers and local community chapters from accessing the TV broadcasting networks.
TV broadcasting has become the single most important and popular means for accessing and educating large numbers of citizens. Therefore, TV broadcasting has a direct effect on the right to free speech and expression as guaranteed by several constitutions around the world, including that of the United States of America.
Research and development has been carried out in the TV and video broadcasting field. The following patents exemplify the state of the art in the relevant field:
1. U.S. Pat. No. 4,215,369 by Ijima, entitled "Digital Transmission System for Television Video Signals", and assigned to Nippon Electric Co.
2. U.S. Pat. No. 4,300,161 by Haskell, entitled "Time Compression Multiplexing of Video Signals", and assigned to Bell Telephone Laboratories, Incorporated.
3. U.S. Pat. No. 4,410,980 by Takasaki, entitled "Time Division Multiplexing System", and assigned to Hitachi, Ltd.
4. U.S. Pat. No. 4,533,936 by Tiemann, entitled "System for Encoding and Decoding Video Signals", and assigned to General Electric Co.
5. U.S. Pat. No. 4,593,318 by Eng, entitled "Technique for the Time Compression Multiplexing of Three Television Signals", and assigned to AT&T Bell Laboratories.
6. U.S. Pat. No. 4,646,135 by Eichelberger, entitled "System for Allowing Two Television Programs Simultaneously to Use the Normal Bandwidth for One Program by Chrominance Time Compression and Luminance Bandwidth Reduction", and assigned to General Electric Co.
The United States Department of Defense has sponsored several projects relating to the field of the present invention. The following Defense Technical Information Center (DTIC) technical reports exemplify some of these projects:
1. AD-A206 140, entitled "Investigation of Optional Compression Techniques for Dither Coding".
2. AD-A210 974, entitled "Robot Vehicle Video Image Compression".
3. AD-A191 577, entitled "Narrative Compression Coding for a Channel with Errors".
4. AD-A194 681, entitled "SNAP/DDN Interface for Information Exchange".
5. AD-A174 316, entitled "A Packet Communication Network Synthesis and Analysis System".
6. AD-A206 999, entitled "Geometric Methods with Application to Robust Detection and Estimation".
7. AD-A207 814, entitled "Random Transform Analysis of a Probabilistic Method for Image Generation".
8. AD-A188 293, entitled "A Video-Rate CCD Two-Dimensional Cosine Transform Processor".
9. AD-A198 390, entitled "Navy Satellite Communications in the Hellenic Environment".
Wherefore, it would be highly desirable to have a new and improved method and apparatus for increasing channel availability and for rendering the channel allocation process more efficient. The new method and apparatus should be relatively simple and inexpensive to implement and to place into effect. The new method and apparatus should also be capable of being implemented with new as well as existing television sets.
Therefore, it is an object of the present invention to address the concerns associated with conventional broadcasting systems, and to provide adequate solutions thereto.
Briefly, the above and further objects and features of the present invention are realized by providing a new and improved video broadcasting method and apparatus. The broadcasting method comprises the step of compressing and multiplexing signals from a plurality of channels over a single carrier frequency.
The multiplexed signals are then transmitted in a packet form to a reception circuit. The multiplexed signals are demultiplexed at the reception circuit, and the demultiplexed signals are then separated into separate channels, and stored for a predetermined period of time.
When a desired channel is selected, only the signals of that selected channel are decompressed and reconstructed on a real-time basis. The video broadcasting apparatus scans all the channels and determines which and whether a particular channel has been selected. If the particular channel has not been selected, then the stored signals for that particular channel are automatically erased in preparation for storage of the next signals.
If the particular channel has been selected, then only the signals of that channel are decompressed, reconstructed and displayed on a real-time basis. The decompressed signals are then automatically erased in preparation for storage of the next demultiplexed signals.
THEREFORE, the inventive method and apparatus for TV or video broadcasting increase channel availability and render the channel allocation process more efficient. The new method and apparatus are relatively simple and inexpensive to implement. The new method and apparatus can be implemented with new as well as existing television sets. Additionally, the new apparatus can be used to prevent copying and taping of generally copyrighted programs.
Furthermore, the new method and apparatus have broad military applications as well as commercial applications. For instance, the inventive broadcasting method and apparatus will provide substantial practical improvements to the U.S. Navy's Telecommunications Systems (NTS), and could be used in satellite communications, and sub-marine imaging
In addition to the military applications, the inventive television broadcasting method and apparatus have versatile commercial applications, such as regular television, high definition TV (HDTV), as well as interactive television and video systems.
The above and other features of the present invention and the manner of attaining them, will become apparent, and the invention itself will be best understood, by reference to the following description and the accompanying drawings, wherein:
FIG. 1 is a block diagram of a method for broadcasting and receiving TV signals according to the present invention;
FIG. 2 is a flow chart further detailing the method for broadcasting of FIG. 1;
FIG. 3 is a block diagram of a TV broadcasting and reception apparatus which is constructed in accordance with the present invention, for implementing the broadcasting process of FIG. 1;
FIG. 4 is diagrammatic representation of the real-time signal processing at the output of a transmitter circuit which forms a part of the apparatus of FIG. 3;
FIG. 5 is a diagrammatic representation of the real-time signal processing at the input of a receiver circuit which forms a part of the apparatus of FIG. 3;
FIG. 6 is a block diagram of another method for broadcasting and receiving TV signals according to the present invention;
FIG. 7 is a flow chart further detailing the method for broadcasting of FIG. 6; and
FIG. 8 is a block diagram of another TV broadcasting and reception apparatus which is constructed in accordance with the present invention, for implementing the broadcasting process of FIG. 6.
Referring now to the drawings, and more particularly to FIG. 1 thereof, there is illustrated a flow chart of a method 10 for broadcasting and receiving TV or video signals according to the present invention. The method 10 generally comprises a process 12 for processing signals to be transmitted, and a process 14 for processing the received signals.
In conventional television or video broadcasting systems the channels 1 through n are received and then displayed on a real time basis as corresponding channels 1 through n. These channels generally occupy the entire bandwidth at the receiver end. Thus, the channel availability in conventional broadcasting systems is severely limited by the allocated TV bandwidth. In most instances, this bandwidth is fixed or limited, and thus not expandable. Since each one of the received channels also generally have fixed bandwidths, the number of channels cannot be increased.
Wherefore, the present broadcasting method 10 (FIG. 1) and apparatus 200 (FIG. 3) offer a valuable advantage over the conventional methods and apparatus, in that the present method and apparatus enable the accommodation of a substantially larger number of channels in the limited TV bandwidth of the receiver.
The transmission process 12 generally includes multiplexing signals from a plurality of channels 1, 2, through n, prior to transmission. The multiplexed signals are then transmitted over a single base frequency. The channels 1 through n generally occupy the entire allocated television or video bandwidth.
The reception process 14 generally includes demultiplexing the transmitted signals, storing the received signals for a predetermined period of time T, and then displaying only the selected channel, on a screen.
Considering now the transmission process 12 in greater in detail, with respect to FIGS. 1 and 4, it includes sampling the signals of a first channel 1 as indicated at 16, for a predetermined period of time T. The sampled signals are then compressed at 17.
The signals of each one of the remaining channels 2 through n are processed similarly to channel 1, as indicated at 18, 19, 20 and 21. The multiplexing of the signals from all the channels 1 through n are then multiplexed at 25 in the form of successive packets FIG. 4 illustrates the real-time multiplexing of the signals from all the channels 1 through n.
Returning now to FIG. 1, the reception process 14 includes receiving the multiplexed signals and then demultiplexing the same at 30 into the same number of separate channels 1 through n. The signals are then independently stored as indicated at 35, 37 and 39 in FIG. 1, and at 40, 42 and 44 in FIG. 5.
Once a particular channel, such as channel 2 is selected at 50 (FIG. 1) only the signals of that particular channel are displayed on a real time basis. However, since the last compressed signals in a packet, such as the first packet, for each channel, such as channel 2, are separated from the beginning of the compressed signals in the next packet, by (n-1)T, it is important to serially display the information contained in successive packets to avoid a non-continuous display of signals.
For this purpose, a processor or computer (not shown) at the receiving end decompresses the signals of the selected channel at 60, and reconstructs the initial real-time signals. Simultaneously, the processor expands the real time spread of the restored signals over a period of T, thus bridging the (n-1)T time between two successive packets. The restored signals are then displayed at 65.
At present, a major limitation to the period T is the limitation on the storage memory. However it should be understood that with the increased availability of expanded memory capacity, the period T will, in the future, be capable of being increased as required by the particular applications.
Considering now FIG. 2 in greater detail, it generally illustrates a flow chart further detailing the reception process of the signals for each individual channel such as channel 1. Such process is carried out by a software program at the receiving end or TV set.
The compressed signals are first received at 75, at the input of a demultiplexer 105 (FIG. 3) in the form of a packet of signals from various channels. The received signals are then demultiplexed at 30, and the demultiplexed signals are then stored for a predetermined period of time T, and for each channel separately from the others, as indicated at 35, 37 and 39 in FIG. 1.
The software then determines at 77 whether that particular channel has been selected. If it has not been selected, then the software waits at 79 for a period (T-t) to elapse; where "t" is defined as a relatively small incremental period compared to the period T.
At the end of the time period (T-t), the software automatically erases the signals stored of the elapsed period (T-t), at 81. The time period t allows the signals from the next packet to replace the erased signals which are received by the demultiplexer 105. Thus, the period t can be substantially smaller than T, and for certain applications, the period t can be so negligible that it can be ignored totally.
The signals from the next packet are then received at 83, and the cycle of multiplexing and storing the signals is then repeated.
If the software determines that the particular channel has been selected by the user or TV viewer, then the stored signals for that particular channel are decompressed and restored at 100, in the manner described above.
The reconstructed signals are then displayed on a real-time basis at 101. Thus, instead of using real-time transmission of the signals, the signals can now be transmitted in a compressed form, thereby clearing precious channel space and increasing channel availability, and the real-time signal reconstruction is carried out at the user's level without excessive cost.
The signals which have been displayed are automatically erased from the storage memory at 105. Once the signals are reconstructed at 100 the previously stored compressed signals are automatically erased at 81, and the cycle of multiplexing and storing the signals is then duplicated.
Referring now to FIG. 3, there is illustrated a block diagram of a TV broadcasting and reception apparatus 200 which is constructed in accordance with the present invention and which performs the steps of the process 10, as illustrated in FIGS. 1 and 2.
In operation, the user simply connects the reception circuit 202 of the apparatus 200 between his or her antenna or cable outlet and the conventional TV set, and operates his or her TV set as usual.
The apparatus 200 also serves another important function, namely to prevent copying or taping of the TV programs. This is accomplished by incorporating the reception circuit 202 inside the TV set, invisibly from the user, thereby preventing access to the reconstructed signals.
The apparatus 200 generally includes a transmission circuit 204 and the reception circuit 202. While the components used in the apparatus 200 are conventional parts, generally known and available in the electronics industry, it should be understood that the general architecture of the apparatus 200, including the combination of its components for producing the desired results, features and advantages is new.
The transmission circuit 204 generally includes a signal sampler 206, 208 and 210 for each one of the channels 1 through n respectively. It further includes a separate compression circuit 216, 218 and 220 for each one of the channels 1 through n. The compressed signals are then fed to a multiplexer 222, and are transmitted to the reception circuit 202.
The reception circuit 202 generally includes a demultiplexer 105 which separates the incoming signals into their respective separate channels. The demultiplexed signals are then stored in a separate memory storage 230, 232 or 234, for each one of the channels 1 through n.
A conventional channel selector 240 enables the user to select the channel he or she wishes to view. A decompressor 250 decompresses and reconstructs only those signals on the selected channel, which signals are then displayed on a screen or monitor (not shown).
An alternative embodiment of the present invention will now be described in conjunction with FIGS. 6, 7 and 8. The numeral references in FIGS. 6, 7 and 8 connote the same or substantially similar elements or processes to those in FIGS. 1, 2 and 3.
The alternative embodiment has several military and commercial applications. For instance, the inventive alternative broadcasting method 12 (FIGS. 6, 7) and apparatus 200 (FIG. 8) will provide substantial practical improvements to the United States Navy Telecommunications Systems (NTS), satellite communications, and sub-marine imaging.
In addition to the military applications, the inventive alternative broadcasting method and apparatus have versatile commercial applications, such as regular television, high definition TV (HDTV), as well as interactive television and educational video systems.
The alternate broadcasting method 12 of FIG. 6 includes identifying the channels that have been selected by the user at the receiver level 202, and then feeding this information back to the transmitter 204 (FIG. 8). This selection information is valuable in further enhancing the broadcasting process, in that the selection information is used to select which of the channels 1 through n will be transmitted.
Hence, instead of transmitting all the channels 1 through n, only those channels which the user wishes to view are selected and then transmitted. In this manner, the efficiency of the preferred broadcasting method illustrated in FIG. 1 is substantially improved.
Let us take a hypothetical example to illustrate the improvements presented by the alternate embodiment. If for instance 50 channels can be transmitted over a conventional television bandwidth, the preferred embodiment will allow the transmission of at least 100 channels, while the alternate embodiment will permit the selective transmission of over 200 channels.
It is preferable to use the alternate broadcasting method and apparatus in special applications such as satellite communications and interactive video, where the number of selected channels is limited. In case of public broadcasting, such as in regular televisions, where all or most of the channels are simultaneously selected by the viewers, the preferred embodiment of the broadcasting apparatus could be used instead.
In specialized applications however, the alternate broadcasting method and apparatus offer substantial additional advantages. Let us consider for instance satellite communications where the selection process is done periodically, automatically or selectively, the delay time t can be designed to correspond to the time it takes the feedback signal to be transmitted to, and reach the satellite so that the processor or computer on board the satellite can select the channels to be transmitted, and then transmit these channels to the exclusion of the channels that have not been selected.
In such application, video cameras can be installed in a matrix format at almost any angle around the satellite, thus capturing a three dimensional view of the surrounding space. If it is therefore desired to view selected space sectors within certain desired angles, the viewer at the receive end simply programs the channel selector 240 to select only those video cameras or channels within the matrix of the desired viewing angles. In this manner, only the space sectors within the desired angles will be viewed.
Similarly, if the alternate broadcasting apparatus and method are used in interactive or educational video, where the viewer has to option to select from a broad range of options, then the viewer can make a selection of his or her choices, these choices are then forwarded to the transmitter and the selected choices are then displayed, while the non-selected choices would not be transmitted or displayed.
Yet another application of the alternate apparatus and method is in video recorders or VCRS, for recording multiple channels. In which case both the transmitter 204 and the receiver 202 are incorporated as part of the VCR circuitry at the user's level. When it is desired to record more than one channel, the user simply stores his or her channel selection using the channel selector 240. A scanner-transmitter 285 identifies the selected channels and transmits them via an electrical or light (i.e. infra-red) connection to a selector-receiver 275. The selector-receiver 275 then issues a command to the signal samplers (i.e. 206, 208 and 210) for the selected channels. The signal samplers are connected to a UHF-VHF antenna (not shown) for receiving the transmitted television signals. The signals from the selected signal samplers are then compressed by the compressors (i.e. 216, 218 and 220) and then multiplexed by the multiplexer 222.
The multiplexed signals could then be recorded on regular video tapes in a compressed form, or for a better performance, these signals could be digitized and stored on tapes or in a computer memory for later retrieval. When the user wishes to view the recorded programs, he or she selects the particular channel to be viewed with the channel selector 240.
The scanner-transmitter 285 then issues a command to the selector-receiver 275 for transmitting only the selected channel to be viewed on a real-time-basis. The demultiplexer 105 then demultiplexes only that particular selected channel and transmits its signals to the corresponding memory storage (i.e. 230). The memory storage stores the signal for a period of n.(T-1) if the compressed signals of the selected channels have substantially similar sampling period or for a period substantially equal to ##EQU1## Ti if the compressed signals of the selected channels do not have substantially similar sampling periods wherein n represents the number of channels that have been originally recorded or selected stored on tape or memory and T or Ti represent the sampling periods of the compressed signals over the selected channels.
As illustrated in FIG. 4, the intermittent storage of the signals from the same channel is important for providing a continuous uninterrupted viewing of the signals. For instance, if the viewer wishes to record three channels, and the sampled signals from the first channel occupy a time slot T (FIG. 4), the memory storage delays the transmission of the first packet signals by a period of "3.T", until the signals from the second packet are processed. In which case, the signals from each one of the packets restored on a real-time-basis, thus achieving a continuous. uninterrupted flow of signals.
The above application can also be used in collecting data, voice, light and video signals from individual transmitter units and channel or "network" them to a single or multiple outputs. One such applications could be used in fast food restaurants or other similar restaurants, where multiple customers can place or select their orders. These orders are then distributed to various food preparers for service.
In this application, the users of the system are the patrons or customers of the restaurant, and the viewers are the food preparers who are located at a remote location from the users, and the system 200 would include a transmitter unit 204 and a plurality of substantially similar reception units or receptors 202. Some of these receptors 202 are allocated to the users and others are allocated to the viewers.
In this manner, the users or customers use the channel selector 240 to make their food selection, while the viewers or food preparers use the channel selectors 240 to view the orders. The users can then make multiple food selections while the food preparers view only their own specialized orders and identify these orders with particular customers who placed the orders Therefore, communication between the customers and the food preparers is substantially enhanced.
The alternate method 12 is illustrated in more detail in FIGS. 6 and 7. It is substantially similar to the method of the preferred embodiment, with the exception that the alternate method 12 includes the step of scanning 29 the selection process of the channels after they have been selected at 50 at the receiver level 202 (FIG. 8). Information on the selected channel, such as which channel has or has not been selected by the user, is then fed back to the transmitter 204 (FIG. 8).
The feedback process can be done in any conventional transmission method, such as over a radio or light frequencies. Lasers and infra-red transmissions can also be used. The frequency of transmission should however be selected in such a way as not to interfere with the simultaneous video transmission.
While particular embodiments of the present invention have been disclosed, it is to be understood that various different modifications are possible and are contemplated within the scope of the specification, drawings, abstract and appended claims.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3213201 *||2 Jul 1962||19 Oct 1965||Ass Elect Ind||Multiplex transmission systems|
|US3693090 *||8 Aug 1969||19 Sep 1972||Communications Patents Ltd||Wired broadcasting systems|
|US3733430 *||28 Dec 1970||15 May 1973||Rca Corp||Channel monitoring system|
|US4215370 *||22 Feb 1978||29 Jul 1980||Digital Communications, Inc.||Satellite video multiplexing communications system|
|US4450477 *||31 Mar 1982||22 May 1984||Lovett Bruce E||Television information system|
|US4467356 *||24 Sep 1981||21 Aug 1984||Mccoy Reginald F H||Transmitting two television signals through one channel|
|US4689661 *||22 Jun 1981||25 Aug 1987||Rai - Radiotelevisione Italiana||Method of simultaneously transmitting a plurality of television signals on a single radio link and apparatus adapted to carry out said method|
|US4896209 *||26 Jan 1988||23 Jan 1990||Sony Corporation||Passenger vehicle polling system having a central unit for polling passenger seat terminal units|
|US4903126 *||10 Feb 1989||20 Feb 1990||Kassatly Salim A||Method and apparatus for tv broadcasting|
|DE3146468A1 *||24 Nov 1981||1 Jun 1983||Deutsche Bundespost||Multiplex concept for a digital optical subscriber network|
|EP0212261A1 *||17 Jul 1986||4 Mar 1987||ANT Nachrichtentechnik GmbH||Broad-band distribution and communication system|
|1||*||Journal on Selected Areas in Communications, IEEE, vol. SAC 5, No. 4, May 1987 (New York, U.S.A.).|
|2||Journal on Selected Areas in Communications, IEEE, vol. SAC-5, No. 4, May 1987 (New York, U.S.A.).|
|3||*||Y. S. Kao et al., Time Multiplexed Analog Transmission of Three Broadcast Quality Television Channels Through One Satellite Transponder pp. 676 684.|
|4||Y.-S. Kao et al., "Time-Multiplexed Analog Transmission of Three Broadcast-Quality Television Channels Through One Satellite Transponder"-pp. 676-684.|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US5133079 *||28 Aug 1990||21 Jul 1992||Ballantyne Douglas J||Method and apparatus for distribution of movies|
|US5157491 *||27 Aug 1990||20 Oct 1992||Kassatly L Samuel A||Method and apparatus for video broadcasting and teleconferencing|
|US5200825 *||1 Jul 1992||6 Apr 1993||Beam Laser Systems, Inc.||Commercial insertion system remotely controlling multiple video switches|
|US5220420 *||10 Sep 1991||15 Jun 1993||Inteletext Systems, Inc.||Interactive home information system for distributing compressed television programming|
|US5274627 *||10 Jul 1991||28 Dec 1993||International Telecommunications Satellite Organization||Non-regenerative multibeam satellite communications system with FDMA access and SSTDM connectivity|
|US5327236 *||3 Apr 1992||5 Jul 1994||Nippon Television Network Corporation||Video switcher apparatus for wide screen EDTV signals|
|US5361096 *||4 Oct 1993||1 Nov 1994||Nec Corporation||Method and apparatus for multiplex transmission of video signals in a plurality of channels with refresh control utilizing intraframe coding|
|US5384780 *||14 May 1993||24 Jan 1995||Codex Corporation||High speed modem, method and system for achieving synchronous data compression|
|US5412720 *||1 May 1992||2 May 1995||Ictv, Inc.||Interactive home information system|
|US5420608 *||27 Jan 1994||30 May 1995||International Business Machines Corporation||Frame buffer organization and control for real-time image decompression|
|US5426645 *||13 Sep 1993||20 Jun 1995||Haskin; Marvin E.||Parallel rule-based data transmission method and apparatus|
|US5430464 *||22 Dec 1993||4 Jul 1995||International Business Machines Corporation||Compressed image frame buffer for high resolution full color, raster displays|
|US5440334 *||1 Feb 1993||8 Aug 1995||Explore Technology, Inc.||Broadcast video burst transmission cyclic distribution apparatus and method|
|US5446490 *||23 Oct 1992||29 Aug 1995||At&T Corp.||Interactive television with tailored programming|
|US5455626 *||15 Nov 1993||3 Oct 1995||Cirrus Logic, Inc.||Apparatus, systems and methods for providing multiple video data streams from a single source|
|US5459514 *||8 Mar 1994||17 Oct 1995||Kabushiki Kaisha Toshiba||Video-signal transmitting and receiving apparatus and method for transmitting and receiving high-resolution and low-resolution television signals|
|US5461619 *||6 Jul 1993||24 Oct 1995||Zenith Electronics Corp.||System for multiplexed transmission of compressed video and auxiliary data|
|US5485197 *||22 Sep 1994||16 Jan 1996||Ictv, Inc.||Carousel display|
|US5495295 *||1 Jun 1994||27 Feb 1996||Zenith Electronics Corporation||Use of transmitter assigned phantom channel numbers for data services|
|US5508733 *||12 Feb 1993||16 Apr 1996||Kassatly; L. Samuel A.||Method and apparatus for selectively receiving and storing a plurality of video signals|
|US5517368 *||1 Jun 1995||14 May 1996||Hitachi, Ltd.||Digital transmission signal processing system and recording/reproducing system|
|US5524271 *||7 Mar 1995||4 Jun 1996||U.S. Philips Corporation||Presentation system for messages that provide information on demand and transmitter station and receiver station for use in such presentation system|
|US5524272 *||22 Dec 1993||4 Jun 1996||Gte Airfone Incorporated||Method and apparatus for distributing program material|
|US5526034 *||3 May 1993||11 Jun 1996||Ictv, Inc.||Interactive home information system with signal assignment|
|US5530598 *||1 Jun 1995||25 Jun 1996||Hitachi, Ltd.||Digital transmission signal processing system and recording/reproducing system|
|US5534926 *||16 Mar 1994||9 Jul 1996||Nec Corporation||Multiplex transmission method for motion picture signals and apparatus therefor|
|US5537141||15 Apr 1994||16 Jul 1996||Actv, Inc.||Distance learning system providing individual television participation, audio responses and memory for every student|
|US5539465 *||7 Jun 1995||23 Jul 1996||Cirrus Logic, Inc.||Apparatus, systems and methods for providing multiple video data streams from a single source|
|US5546388 *||18 Mar 1994||13 Aug 1996||Lin; Feng||Packet-switched facsimile network and method of operation|
|US5550578 *||6 Oct 1994||27 Aug 1996||Ictv, Inc.||Interactive and conventional television information system|
|US5550590 *||28 Feb 1995||27 Aug 1996||Kokusai Denshin Denwa Kabushiki Kaisha||Bit rate controller for multiplexer of encoded video|
|US5550825 *||19 Nov 1991||27 Aug 1996||Scientific-Atlanta, Inc.||Headend processing for a digital transmission system|
|US5555260 *||24 Aug 1995||10 Sep 1996||Telefonaktiebolaget Lm Ericsson||Decentralized base station for reducing bandwidth requirements for communications to and from radio transmitter-receivers in a telecommunications network|
|US5557316 *||29 Sep 1994||17 Sep 1996||Ictv, Inc.||System for distributing broadcast television services identically on a first bandwidth portion of a plurality of express trunks and interactive services over a second bandwidth portion of each express trunk on a subscriber demand basis|
|US5557318 *||7 Jul 1995||17 Sep 1996||Koninklijke Ptt Nederland N.V.||Method and apparatus for permitting a viewer to scan through a plurality of video signals provided by a transmitter|
|US5585858||12 Aug 1994||17 Dec 1996||Actv, Inc.||Simulcast of interactive signals with a conventional video signal|
|US5587734 *||3 Nov 1994||24 Dec 1996||Ictv, Inc.||User interface for selecting television information services through pseudo-channel access|
|US5594507 *||27 May 1994||14 Jan 1997||Ictv, Inc.||Compressed digital overlay controller and method for MPEG type video signal|
|US5612742 *||19 Oct 1994||18 Mar 1997||Imedia Corporation||Method and apparatus for encoding and formatting data representing a video program to provide multiple overlapping presentations of the video program|
|US5627692 *||7 Jun 1996||6 May 1997||Sony Corporation||Recording and reproducing apparatus for reproducing time-base compressed signals dependent on the time-base compression implemented|
|US5629736 *||1 Nov 1994||13 May 1997||Lucent Technologies Inc.||Coded domain picture composition for multimedia communications systems|
|US5632007||23 Sep 1994||20 May 1997||Actv, Inc.||Interactive system and method for offering expert based interactive programs|
|US5642167 *||12 Dec 1994||24 Jun 1997||Wallace; Richard Scot||TV picture compression and expansion|
|US5644355 *||24 Feb 1992||1 Jul 1997||Intelligent Instruments Corporation||Adaptive video subscriber system and methods for its use|
|US5671095 *||5 May 1994||23 Sep 1997||Hitachi, Ltd.||Digital transmission signal processing system and recording/reproducing system|
|US5673154 *||22 Mar 1996||30 Sep 1997||Hitachi, Ltd.||Digital transmission signal processing system and recording/reproducing system|
|US5682196||22 Jun 1995||28 Oct 1997||Actv, Inc.||Three-dimensional (3D) video presentation system providing interactive 3D presentation with personalized audio responses for multiple viewers|
|US5691777 *||27 Jan 1992||25 Nov 1997||Kassatly; Lord Samuel Anthony||Method and apparatus for simultaneous compression of video, audio and data signals|
|US5699203 *||22 Mar 1996||16 Dec 1997||Hitachi, Ltd.||Digital transmission signal processing system and recording reproducing system|
|US5710970 *||8 Aug 1995||20 Jan 1998||Instant Video Technologies, Inc.||Broadcast video burst transmission cyclic distribution method|
|US5724091||18 May 1995||3 Mar 1998||Actv, Inc.||Compressed digital data interactive program system|
|US5767913 *||25 May 1995||16 Jun 1998||Kassatly; Lord Samuel Anthony||Mapping system for producing event identifying codes|
|US5768517 *||25 May 1995||16 Jun 1998||Kassatly; Samuel Anthony||Paperless publication distribution and retrieval system|
|US5790177 *||25 May 1995||4 Aug 1998||Kassatly; Samuel Anthony||Digital signal recording/reproduction apparatus and method|
|US5793411 *||31 Jan 1996||11 Aug 1998||Fujitsu Limited||Video-on-demand system|
|US5812665 *||7 Jun 1996||22 Sep 1998||Ictv, Inc.||Switched channel system|
|US5861881 *||8 Feb 1996||19 Jan 1999||Actv, Inc.||Interactive computer system for providing an interactive presentation with personalized video, audio and graphics responses for multiple viewers|
|US5862004 *||27 Aug 1997||19 Jan 1999||Hitachi, Ltd.||Digital transmission signal processing system and recording/reproducing system|
|US5862140 *||21 Nov 1995||19 Jan 1999||Imedia Corporation||Method and apparatus for multiplexing video programs for improved channel utilization|
|US5883661 *||1 Nov 1995||16 Mar 1999||Ictv, Inc.||Output switching for load levelling across multiple service areas|
|US5926205 *||22 Jan 1997||20 Jul 1999||Imedia Corporation||Method and apparatus for encoding and formatting data representing a video program to provide multiple overlapping presentations of the video program|
|US5933192 *||18 Jun 1997||3 Aug 1999||Hughes Electronics Corporation||Multi-channel digital video transmission receiver with improved channel-changing response|
|US5949476 *||20 Oct 1993||7 Sep 1999||Cableshare, Inc.||Television system distributing a dynamically varying number of concurrent video presentations over a single television channel|
|US5956088 *||21 Nov 1995||21 Sep 1999||Imedia Corporation||Method and apparatus for modifying encoded digital video for improved channel utilization|
|US5970386 *||27 Jan 1997||19 Oct 1999||Hughes Electronics Corporation||Transmodulated broadcast delivery system for use in multiple dwelling units|
|US5991596 *||24 Oct 1996||23 Nov 1999||Stanford Telecommunications, Inc.||Wireless request channel for use with information broadcast system|
|US6002536 *||10 Nov 1998||14 Dec 1999||Hitachi Ltd.||Digital transmission signal processing system and recording/reproducing system|
|US6002720 *||10 Apr 1996||14 Dec 1999||H. Lee Browne, D/B/A Greenwich Information Technologies Llc||Audio and video transmission and receiving system|
|US6005620 *||31 Jan 1997||21 Dec 1999||Hughes Electronics Corporation||Statistical multiplexer for live and pre-compressed video|
|US6049694 *||27 Aug 1996||11 Apr 2000||Kassatly; Samuel Anthony||Multi-point video conference system and method|
|US6069757 *||7 Jun 1999||30 May 2000||Hitachi, Ltd.||Digital transmission signal processing system and recording/reproducing system|
|US6078958 *||31 Jan 1997||20 Jun 2000||Hughes Electronics Corporation||System for allocating available bandwidth of a concentrated media output|
|US6084910 *||31 Jan 1997||4 Jul 2000||Hughes Electronics Corporation||Statistical multiplexer for video signals|
|US6091455 *||31 Jan 1997||18 Jul 2000||Hughes Electronics Corporation||Statistical multiplexer for recording video|
|US6097435 *||31 Jan 1997||1 Aug 2000||Hughes Electronics Corporation||Video system with selectable bit rate reduction|
|US6100883 *||4 Jun 1996||8 Aug 2000||Ictv, Inc.||Home interface controller for providing interactive cable television|
|US6144702 *||23 Jul 1998||7 Nov 2000||Greenwich Information Technologies, Llc||Audio and video transmission and receiving system|
|US6166729 *||7 May 1997||26 Dec 2000||Broadcloud Communications, Inc.||Remote digital image viewing system and method|
|US6181334||3 Jul 1997||30 Jan 2001||Actv, Inc.||Compressed digital-data interactive program system|
|US6188428||11 Feb 1992||13 Feb 2001||Mark Koz||Transcoding video file server and methods for its use|
|US6188436||31 Jan 1997||13 Feb 2001||Hughes Electronics Corporation||Video broadcast system with video data shifting|
|US6204843||28 Oct 1999||20 Mar 2001||Actv, Inc.||Compressed digital-data interactive program system|
|US6205582||18 Sep 1998||20 Mar 2001||Ictv, Inc.||Interactive cable television system with frame server|
|US6215484||28 Oct 1999||10 Apr 2001||Actv, Inc.||Compressed digital-data interactive program system|
|US6252586||28 Oct 1999||26 Jun 2001||Actv, Inc.||Compressed digital-data interactive program system|
|US6278564||9 May 2000||21 Aug 2001||Hitachi, Ltd.||Digital transmission signal processing system and recording/reproducing system|
|US6324025||5 Sep 2000||27 Nov 2001||Hitachi, Ltd.||Digital transmission signal processing system and recording/reproducing system|
|US6377624 *||9 Sep 1994||23 Apr 2002||U.S. Philips Corporation||Device for transmitting a plurality of television signals through a transmission channel|
|US6434748||25 Feb 1997||13 Aug 2002||Imedia Corporation||Method and apparatus for providing VCR-like “trick mode” functions for viewing distributed video data|
|US6493873||20 Jan 1998||10 Dec 2002||Hughes Electronics Corporation||Transmodulator with dynamically selectable channels|
|US6498691||16 Mar 2001||24 Dec 2002||Hitachi, Ltd.||Digital transmission signal processing system and recording/reproducing system|
|US6590726||23 Oct 2002||8 Jul 2003||Hitachi, Ltd.||Apparatus and method for transmitting and receiving digital information|
|US6633982 *||20 Mar 1999||14 Oct 2003||Wayne Samuel Kurzeja||Method and process for managing ultra secure electronic distribution of digital movies to commercial exhibitors|
|US6952315||15 Dec 2003||4 Oct 2005||Hitachi, Ltd.||Digital information recording/reproducing apparatus|
|US7012769||2 Apr 2003||14 Mar 2006||Hitachi, Ltd.||Digital information recording/reproducing apparatus|
|US7027240||26 Jun 2003||11 Apr 2006||Hitachi, Ltd.||Digital information recording/reproducing method and apparatus|
|US7259926||19 Dec 2005||21 Aug 2007||Hitachi, Ltd.||Digital information recording/reproducing apparatus|
|US7286310||31 Jul 2006||23 Oct 2007||Hitachi, Ltd.||Apparatus for receiving compressed digital information|
|US7363645 *||28 Sep 2001||22 Apr 2008||Sedna Patent Services, Llc||Interactive electronic program guide for use with television delivery system|
|US7487523||1 Oct 2001||3 Feb 2009||Comcast Ip Holdings I, Llc||Tiered programming television delivery system|
|US7673321||23 Oct 2002||2 Mar 2010||Paul Yurt||Audio and video transmission and receiving system|
|US7702752||6 Jan 2005||20 Apr 2010||Disney Enterprises, Inc.||Method and apparatus for redirection of server external hyper-link references|
|US7730512||28 Apr 2006||1 Jun 2010||Acacia Media Technologies Corporation||Audio and video transmission and receiving system|
|US7739584||18 Jul 2003||15 Jun 2010||Zane Vella||Electronic messaging synchronized to media presentation|
|US7770196||1 Oct 2001||3 Aug 2010||Comcast Ip Holdings I, Llc||Set top terminal for organizing program options available in television delivery system|
|US7808733||29 Oct 2007||5 Oct 2010||Hitachi Consumer Electronics Co., Ltd.||Method and apparatus for transmitting and receiving digital video and audio information|
|US7818773||11 Nov 2002||19 Oct 2010||Acacia Media Technologies Corporation||Audio and video transmission and receiving system|
|US7836481||28 Sep 2001||16 Nov 2010||Comcast Ip Holdings I, Llc||Set top terminal for generating an interactive electronic program guide for use with television delivery system|
|US7859777||29 Oct 2007||28 Dec 2010||Hitachi Consumer Electronics Co., Ltd.||Method and apparatus for transmitting and receiving digital video and audio information|
|US7952823||29 Oct 2007||31 May 2011||Hitachi Consumer Electronics Co., Ltd.||Method for transmitting digital audio and video information|
|US7984474||9 Dec 2002||19 Jul 2011||Quartics, Inc.||Method and apparatus for a digitized CATV network for bundled services|
|US8009375||19 Dec 2005||30 Aug 2011||Hitachi Consumer Electronics Co., Ltd.||Apparatus and method for receiving and recording digital information|
|US8027482||12 Feb 2004||27 Sep 2011||Hollinbeck Mgmt. Gmbh, Llc||DVD audio encoding using environmental audio tracks|
|US8045845||3 Jan 2005||25 Oct 2011||Hollinbeck Mgmt. Gmbh, Llc||System for holding a current track during playback of a multi-track media production|
|US8060905 *||1 Oct 2001||15 Nov 2011||Comcast Ip Holdings I, Llc||Television delivery system having interactive electronic program guide|
|US8117286||26 Feb 2010||14 Feb 2012||Disney Enterprises, Inc.||Method and apparatus for redirection of server external hyper-link references|
|US8117635||25 Mar 2010||14 Feb 2012||Comcast Ip Holdings I, Llc||Method and apparatus for targeting of interactive virtual objects|
|US8139924||7 Jul 2006||20 Mar 2012||Tivo Inc.||System and method for digital content retrieval|
|US8165448||24 Mar 2004||24 Apr 2012||Hollinbeck Mgmt. Gmbh, Llc||System using multiple display screens for multiple video streams|
|US8238721||14 Dec 2004||7 Aug 2012||Hollinbeck Mgmt. Gmbh, Llc||Scene changing in video playback devices including device-generated transitions|
|US8245259||16 Aug 2010||14 Aug 2012||Comcast Ip Holdings I, Llc||Video and digital multimedia aggregator|
|US8442110||9 Oct 2008||14 May 2013||Activevideo Networks, Inc.||Method for bandwidth regulation on a cable television system channel|
|US8578410||17 Dec 2010||5 Nov 2013||Comcast Ip Holdings, I, Llc||Video and digital multimedia aggregator content coding and formatting|
|US8621521||9 Jul 2012||31 Dec 2013||Comcast Ip Holdings I, Llc||Video and digital multimedia aggregator|
|US8687949||6 Mar 2012||1 Apr 2014||Tivo Inc.||System and method for digital content retrieval|
|US8737816||6 Aug 2003||27 May 2014||Hollinbeck Mgmt. Gmbh, Llc||System for selecting video tracks during playback of a media production|
|US8837921 *||23 Aug 2004||16 Sep 2014||Hollinbeck Mgmt. Gmbh, Llc||System for fast angle changing in video playback devices|
|US9021541||14 Oct 2011||28 Apr 2015||Activevideo Networks, Inc.||Streaming digital video between video devices using a cable television system|
|US9042454||11 Jan 2008||26 May 2015||Activevideo Networks, Inc.||Interactive encoded content system including object models for viewing on a remote device|
|US9077860||5 Dec 2011||7 Jul 2015||Activevideo Networks, Inc.||System and method for providing video content associated with a source image to a television in a communication network|
|US9078014||23 Dec 2011||7 Jul 2015||Comcast Ip Holdings I, Llc||Method and apparatus for targeting of interactive virtual objects|
|US9123084||12 Apr 2012||1 Sep 2015||Activevideo Networks, Inc.||Graphical application integration with MPEG objects|
|US9204203||3 Apr 2012||1 Dec 2015||Activevideo Networks, Inc.||Reduction of latency in video distribution networks using adaptive bit rates|
|US9219922||6 Jun 2013||22 Dec 2015||Activevideo Networks, Inc.||System and method for exploiting scene graph information in construction of an encoded video sequence|
|US9286294||3 Aug 2001||15 Mar 2016||Comcast Ip Holdings I, Llc||Video and digital multimedia aggregator content suggestion engine|
|US9294785||25 Apr 2014||22 Mar 2016||Activevideo Networks, Inc.||System and method for exploiting scene graph information in construction of an encoded video sequence|
|US9326047||6 Jun 2014||26 Apr 2016||Activevideo Networks, Inc.||Overlay rendering of user interface onto source video|
|US9355681||11 Jan 2008||31 May 2016||Activevideo Networks, Inc.||MPEG objects and systems and methods for using MPEG objects|
|US9641873 *||25 Jun 1998||2 May 2017||The Directv Group, Inc.||Method and apparatus for controlling broadcast programming content|
|US9788029||26 Apr 2015||10 Oct 2017||Activevideo Networks, Inc.||Intelligent multiplexing using class-based, multi-dimensioned decision logic for managed networks|
|US9800945||26 Apr 2015||24 Oct 2017||Activevideo Networks, Inc.||Class-based intelligent multiplexing over unmanaged networks|
|US9813641||3 Jun 2015||7 Nov 2017||Comcast Ip Holdings I, Llc||Method and apparatus for targeting of interactive virtual objects|
|US20030122954 *||26 Nov 2002||3 Jul 2003||Kassatly L. Samuel Anthony||Video camera and method and device for capturing video, audio and data signals|
|US20030190156 *||2 Apr 2003||9 Oct 2003||Hidoe Arai||Digital information recording/reproducing apparatus|
|US20040008977 *||26 Jun 2003||15 Jan 2004||Hideo Arai||Digital information recording/reproducing apparatus|
|US20040098754 *||18 Jul 2003||20 May 2004||Mx Entertainment||Electronic messaging synchronized to media presentation|
|US20040126085 *||6 Aug 2003||1 Jul 2004||Mx Entertainment||System for selecting video tracks during playback of a media production|
|US20040126087 *||15 Dec 2003||1 Jul 2004||Hideo Arai||Digital information recording/reproducing apparatus|
|US20040252851 *||12 Feb 2004||16 Dec 2004||Mx Entertainment||DVD audio encoding using environmental audio tracks|
|US20050191041 *||14 Dec 2004||1 Sep 2005||Mx Entertainment||Scene changing in video playback devices including device-generated transitions|
|US20050201725 *||23 Aug 2004||15 Sep 2005||Mx Entertainment||System for fast angle changing in video playback devices|
|US20050213946 *||24 Mar 2004||29 Sep 2005||Mx Entertainment||System using multiple display screens for multiple video streams|
|US20060020994 *||21 Jul 2004||26 Jan 2006||Ron Crane||Television signal transmission of interlinked data and navigation information for use by a chaser program|
|US20060093332 *||19 Dec 2005||4 May 2006||Hideo Arai||Digital information recording/reproducing apparatus|
|US20060098951 *||19 Dec 2005||11 May 2006||Hideo Arai||Digital information recording/reproducing apparatus|
|US20060117340 *||22 Jun 2005||1 Jun 2006||Ictv, Inc.||Interactive cable television system without a return path|
|US20060150100 *||3 Jan 2005||6 Jul 2006||Mx Entertainment||System for holding a current track during playback of a multi-track media production|
|US20060269254 *||31 Jul 2006||30 Nov 2006||Hideo Arai||Digital information recording/reproducing apparatus|
|US20080069538 *||29 Oct 2007||20 Mar 2008||Hideo Arai||Digital information recording/reproducing apparatus|
|US20080175314 *||29 Oct 2007||24 Jul 2008||Hideo Arai||Digital Information Recording/Reproducing Apparatus|
|US20080235725 *||2 Jun 2008||25 Sep 2008||John S Hendricks||Electronic program guide with targeted advertising|
|US20080253743 *||29 Oct 2007||16 Oct 2008||Hideo Arai||Digital Information Recording/Reproducing Apparatus|
|US20090041118 *||9 Oct 2008||12 Feb 2009||Activevideo Networks, Inc.||Method for Bandwidth Regulation on a Cable Television System Channel|
|US20100313215 *||16 Aug 2010||9 Dec 2010||Comcast Ip Holdings I, Llc||Video and digital multimedia aggregator|
|USRE44685||10 Jul 2001||31 Dec 2013||Opentv, Inc.||Apparatus for transmitting and receiving executable applications as for a multimedia system, and method and system to order an item using a distributed computing system|
|CN1089683C *||19 Sep 1997||28 Aug 2002||王卫中||Ceramic roller for transferring water in printing machine and its making method|
|DE4228753B4 *||28 Aug 1992||8 Feb 2007||Hitachi, Ltd.||Verfahren und Einrichtung für den Fernsehempfang|
|DE4245023B4 *||28 Aug 1992||18 Jan 2007||Hitachi, Ltd.||Multiple channel TV transmission method - including receiver with channel selector for multiplexed video information and control data as well as signal separator with decoder|
|EP0933892A2 *||3 Jan 1992||4 Aug 1999||Greenwich Technologies||Audio and visual transmission and receiving system|
|EP0933892A3 *||3 Jan 1992||18 Aug 1999||Greenwich Technologies||Audio and visual transmission and receiving system|
|EP1330126A2 *||3 Jan 1992||23 Jul 2003||Acacia Media Technologies Corporation||Audio and video transmission and receiving system|
|EP1330126A3 *||3 Jan 1992||22 Oct 2003||Acacia Media Technologies Corporation||Audio and video transmission and receiving system|
|EP1335601A2 *||3 Jan 1992||13 Aug 2003||Acacia Media Technologies Corporation||Audio and video transmission and receiving system|
|EP1335601A3 *||3 Jan 1992||22 Oct 2003||Acacia Media Technologies Corporation||Audio and video transmission and receiving system|
|EP1335602A2 *||3 Jan 1992||13 Aug 2003||Acacia Media Technologies Corporation||Audio and video transmission and receiving system|
|EP1335602A3 *||3 Jan 1992||22 Oct 2003||Acacia Media Technologies Corporation||Audio and video transmission and receiving system|
|EP1339236A2 *||3 Jan 1992||27 Aug 2003||Acacia Media Technologies Corporation||Audio and video transmission and receiving system|
|EP1339236A3 *||3 Jan 1992||22 Oct 2003||Acacia Media Technologies Corporation||Audio and video transmission and receiving system|
|EP1359759A1 *||3 Jan 1992||5 Nov 2003||Acacia Media Technologies Corporation||Audio and video transmission and receiving system|
|EP1359760A1 *||3 Jan 1992||5 Nov 2003||Acacia Media Technologies Corporation||Audio and video transmission and receiving system|
|EP1367828A1 *||3 Jan 1992||3 Dec 2003||Acacia Media Technologies Corporation||Audio and visual transmission and receiving system|
|WO1993011617A1 *||20 Nov 1992||10 Jun 1993||Actv, Inc.||Compressed digital data interactive television system|
|WO1993016557A1 *||11 Feb 1992||19 Aug 1993||Koz Mark C||Adaptive video file server and methods for its use|
|WO1994027388A1 *||11 Apr 1994||24 Nov 1994||Codex Corporation||High speed modem, method and system for achieving synchronous data compression|
|WO1998051080A1 *||7 May 1998||12 Nov 1998||Edward Acosta||Remote visual information monitoring system and method|
|U.S. Classification||348/469, 370/521, 370/477, 455/88, 455/69, 348/E05.005, 386/E09.013, 375/E07.27, 348/385.1, 348/E07.024, 348/E07.083, 348/E07.039|
|International Classification||H04N21/2365, H04N21/434, H04N7/15, H04N9/804, H04N7/08, H04N9/82|
|Cooperative Classification||H04N21/2365, H04N7/0806, H04N7/08, H04N21/434, H04N7/15, H04N21/4347, H04N9/8227, H04N9/8042|
|European Classification||H04N21/2365, H04N21/434V, H04N21/434, H04N9/804B, H04N7/15, H04N7/08C, H04N7/08|
|6 Jun 1994||FPAY||Fee payment|
Year of fee payment: 4
|2 Jun 1998||FPAY||Fee payment|
Year of fee payment: 8
|22 Jul 1999||AS||Assignment|
Owner name: ORBSAK, L.L.C., ILLINOIS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KASSATLY, L. SAMUEL A.;REEL/FRAME:010103/0758
Effective date: 19990717
|18 Jun 2002||REMI||Maintenance fee reminder mailed|
|18 Jul 2002||FPAY||Fee payment|
Year of fee payment: 12
|18 Jul 2002||SULP||Surcharge for late payment|
Year of fee payment: 11